JP2014513845A - Conductive component and preparation method thereof - Google Patents

Abstract

A conductive component is disclosed in the present invention, which includes an insulating layer and a metal mesh placed on the insulating layer, the metal mesh defining a plurality of gaps arranged in an array, wherein the gaps of the metal mesh and the opening ratio K of the light transmittance T ₁ of the conductive component, the relationship between the light transmittance T ₂ of the insulating layer, the following formula: satisfies the _T 1 ₌ T 2 _* ^K. The metal mesh is disposed on the insulating layer in the conductive component, and a patterned sensing layer on the insulating layer is achieved by exposing and developing the metal mesh as required in use, and then touch screen The use of indium tin oxide is avoided in conductive components, and therefore the cost of conductive components is low. A method for preparing a conductive component is also provided.

Description

FIELD OF THE INVENTION This invention relates to conductive components and methods for their preparation.

BACKGROUND OF THE INVENTION Recently, capacitive touch screens are increasingly preferred in the market because of many advantages such as high transparency, multi-touch and long server life. Currently, a transparent conductive material (indium tin oxide, ITO) is coated on a PET or glass substrate by vacuum evaporation or magnetron sputtering to form a conductive component that is applied to a capacitive touch screen. .

  However, indium is a rare earth element, which has relatively low reserves in nature and is expensive, thus making conductive components expensive.

SUMMARY OF THE INVENTION One object of the present invention is to provide an inexpensive conductive component and method for its preparation.

The conductive component includes an insulating layer and a metal mesh placed on the insulating layer, the metal mesh defining a plurality of gaps arranged in an array, and the opening ratio K of the gaps of the metal mesh and the conductive layer. a light transmittance _{T 1} of the sexual component, the relationship between the light transmittance _{T 2} of the insulating layer, _wherein: is described as _T 1 ₌ T ^{2 *} K.

  In one embodiment, the gap is square or rhombus, and the metal mesh includes a plurality of parallel first metal lines and a plurality of parallel second metal lines, the first metal line and the second metal line. Lines intersect each other to form a gap.

  In one embodiment, at least one of the first metal line and the second metal line is a solid line or a mesh line.

  In one embodiment, the width of the first metal line and the second metal line is not less than 45 nm and not more than 40000 nm.

  In one example, the width of the first metal line and the second metal line is not less than 45 nm and not more than 5000 nm.

  In one embodiment, the metal mesh gaps are regular hexagons in a honeycomb configuration.

  In one embodiment, the gap between the metal meshes is a triangle, and the metal mesh comprises a plurality of parallel first metal lines, a plurality of parallel second metal lines, and a plurality of parallel third metal lines. The first metal line and the second metal line are inclined with respect to each other and intersect with each other to form a plurality of rhombus gaps arranged in an array, and the third metal line is The diamond-shaped gap is divided into triangular gaps through the opposite ends of the corresponding diamond-shaped gap.

  In one embodiment, at least one of the first metal line, the second metal line, and the third metal line is a solid line or a mesh line.

  In one example, the width of the first metal line, the second metal line, and the third metal line is not less than 45 nm and not more than 40000 nm.

  In one example, the width of the first metal line, the second metal line, and the third metal line is not less than 45 nm and not more than 5000 nm.

  In one embodiment, an anti-oxidation layer is provided on the surface of the metal mesh, and the anti-oxidation layer is formed from a material selected from the group consisting of gold, platinum, nickel and nickel-gold alloys.

In one embodiment, the insulating layer is a glass substrate or a plastic film.
In one embodiment, the glass substrate is formed from a material selected from the group consisting of inorganic silicate glass and polymethyl methacrylate.

  In one embodiment, the plastic membrane is formed from a material selected from the group consisting of polyethylene terephthalate and polycarbonate.

  In one embodiment, the surface of the insulating layer is provided with a functional layer having antiglare, curing, antireflection, and atomization functions, and the metal mesh is formed on the surface of the functional layer.

  In one embodiment, the functional layer having an antireflection function is selected from the group consisting of a titanium dioxide coating, a magnesium fluoride coating, and a calcium fluoride coating.

In one embodiment, the thickness of the metal mesh is not less than 45 nm and not more than 40000 nm.
Methods for preparing conductive components are:
Forming a metal layer on the insulating layer;
Processing the metal layer to form a metal mesh placed on the insulating layer by exposure and development, the metal mesh defining a plurality of gaps arranged in an array, and opening the gaps in the metal mesh ratio and K, the conductive component and the light transmittance _{T 1,} the relationship between the light transmittance _{T 2} of the insulating layer, _wherein: is described as _T 1 ₌ T ^{2 *} K.

  In one embodiment, the gap is square or rhombus, and the metal mesh includes a plurality of parallel first metal lines and a plurality of parallel second metal lines, the first metal line and the second metal line. Lines intersect each other to form a gap.

  In one embodiment, at least one of the first metal line and the second metal line is a solid line or a mesh line.

  In one embodiment, the width of the first metal line and the second metal line is not less than 45 nm and not more than 40000 nm.

  In one example, the width of the first metal line and the second metal line is not less than 45 nm and not more than 5000 nm.

  In one embodiment, the metal mesh gaps are regular hexagons and are in a honeycomb configuration.

  In one embodiment, the gap between the metal meshes is a triangle, and the metal mesh comprises a plurality of parallel first metal lines, a plurality of parallel second metal lines, and a plurality of parallel third metal lines. The first metal line and the second metal line are inclined with respect to each other and intersect with each other to form a plurality of rhombus gaps arranged in an array, and the third metal line is The diamond-shaped gap is divided into triangular gaps through two opposite ends of the corresponding diamond-shaped gap.

  In one embodiment, at least one of the first metal line, the second metal line, and the third metal line is a solid line or a mesh line.

  In one example, the width of the first metal line, the second metal line, and the third metal line is not less than 45 nm and not more than 40000 nm.

  In one example, the width of the first metal line, the second metal line, and the third metal line is not less than 45 nm and not more than 5000 nm.

  In one embodiment, an anti-oxidation layer is provided on the surface of the metal mesh, and the anti-oxidation layer is formed from a material selected from the group consisting of gold, platinum, nickel, and gold-nickel alloy.

In one embodiment, the insulating layer is a glass substrate or a plastic film.
In one embodiment, the glass substrate is formed from a material selected from the group consisting of inorganic silicate glass and polymethyl methacrylate.

  In one embodiment, the plastic membrane is formed from a material selected from the group consisting of polyethylene terephthalate and polycarbonate.

  In one embodiment, the surface of the insulating layer is provided with a functional layer having antiglare, curing, antireflection, and atomization functions, and the metal mesh is formed on the surface of the functional layer.

  In one embodiment, the functional layer having an antireflection function is selected from the group consisting of a titanium dioxide coating, a magnesium fluoride coating, and a calcium fluoride coating.

In one embodiment, the thickness of the metal mesh is not less than 45 nm and not more than 40000 nm.
In the conductive component and its preparation method, the metal mesh is disposed on the insulating layer, and a patterned sensing layer on the insulating layer is formed by exposing and developing the metal mesh as required during use. May then be applied to the touch screen and the use of indium tin oxide is avoided in the conductive component, and thus the cost of the conductive component is low.

FIG. 3 is a schematic cross-sectional view of an example of a conductive component. FIG. 2 is a schematic view of a metal mesh of the conductive component shown in FIG. 1. FIG. 4 is a schematic view of a metal mesh of a conductive component according to another embodiment. FIG. 4 is a schematic view of a metal mesh of a conductive component according to another embodiment. FIG. 4 is a schematic view of a metal mesh of a conductive component according to another embodiment. 6 is a flowchart of an embodiment of a method for preparing a conductive component.

Detailed Description of the Embodiments With reference to the drawings, embodiments of this conductive component and its preparation method will now be described in detail.

  With reference to FIG. 1, an example of a conductive component 10 includes an insulating layer 110 and a metal mesh 120 disposed on the insulating layer 110.

  The insulating layer 110 is a glass substrate or a plastic film. The glass substrate is formed from an inorganic silicate or polymethyl methacrylate (PMMA) material. The plastic film is formed from a material of polyethylene terephthalate (PET) or polycarbonate (PC). In short, the insulating layer 110 is formed of a transparent insulating material.

  The insulating layer 110 is substantially sheet-like. The surface of the insulating layer 110 is provided with a functional layer (not shown) having functions of antiglare, curing, antireflection, and atomization. When the functional layer having an antiglare or atomizing function is formed by coating with a paint having an antiglare or atomizing function, the paint includes metal oxide particles; a functional layer having a curing function. Is formed by a coating of a polymer paint having a curing function; the functional layer having an antireflection function is a titanium dioxide coating, a magnesium fluoride coating or a calcium fluoride coating.

  The functional layer may be selectively provided on one surface of the insulating layer 110 or two opposite surfaces of the insulating layer 110. Preferably, the functional layer 110 is provided on the surface of the insulating layer 110 apart from the metal mesh 110, that is, the metal mesh 110 and the functional layer are respectively disposed on two opposing surfaces of the insulating layer 110. The It should be noted that when the functional layer is provided on the insulating layer 110, the metal mesh 120 is placed on the surface of the functional layer.

  Referring to FIG. 2, the metal mesh 120 is placed on the surface of the insulating layer 110. The metal mesh 120 has a plurality of gaps 121 arranged in an array. It should be noted that when the functional layer is provided on the insulating layer 110, the metal mesh 120 is placed on the surface of the functional layer.

  In the illustrated embodiment, the shapes and sizes of the plurality of gaps 121 are the same. In the illustrated embodiment, the gaps 121 are square and the plurality of gaps 121 are arranged in an array. The metal mesh 120 includes a plurality of parallel first metal lines 123 and a plurality of parallel second metal lines 125. The first metal line 123 and the second metal line 125 are mesh-like lines structured by metal wires 1201 that intersect a plurality of crosses. The first metal wire 123 and the second metal wire 125 each have a plurality of stitches 1202. The first metal line 123 and the second metal line 125 intersect to form a square gap 121 arranged in an array, and the area of the gap 121 is larger than that of the mesh 1202.

  In the illustrated embodiment, the metal mesh 120 is formed from copper, silver, molybdenum aluminum molybdenum alloy, or copper nickel alloy. In order to avoid oxidation of the metal mesh 120, an antioxidant layer is formed on the surface of the metal mesh 120, and the antioxidant layer is formed from an inert metal such as gold, platinum, nickel, nickel gold alloy, etc. .

The thickness of the metal mesh 120 is not less than 45 nm and not more than 40000 nm.
The width (D) of the lines of the metal mesh 120 (that is, the first metal line 123 and the second metal line 125) is not less than 45 nm and not more than 40000 nm. It should be noted that the line width (D) of the metal mesh 120 has an effect on the resolution of the touch screen 10. If the line width (D) of the metal mesh 120 is too large, the line will be visible and therefore the resolution of the touch screen 10 may be affected. Preferably, the line width (D) of the metal mesh 120 is not less than 45 nm and not more than 5000 nm.

To ensure the sensitivity of the touch screen 10 to the signal, the aperture ratio (K) of the metal mesh 120, the transmittance of the conductive component 10 (T ₁ ), and the transmittance of the insulating layer (T ₂ ) are as follows: Can be described as: T ₁ = T ₂ ^* K. Thus, the aperture ratio of the metal mesh 120 that is met with the desired conditions may be calculated according to the designed transmittance of the conductive component 10.

Taking the metal mesh 120 as an example, the gap 121 of the metal mesh 120 is square. The line width of the metal mesh 120 is D, and the opening width of the gap 121 of the metal mesh 120 is L. The metal mesh 120 may be viewed as being composed of a plurality of unit cells whose side length is D + L, and the opening ratio (K) of the metal mesh 120 is equal to the area of the gap 121 divided by the area of the unit cell. equal. Specifically, in the example shown, K = L ² / (L + D) ² .

  In the conductive component 10, the metal mesh 120 is disposed on the insulating layer 110. In use, a patterned sensing layer is formed on the insulating layer 110 by exposing and developing the metal mesh as needed, and then applied to the touch screen. The use of indium tin oxide is avoided in the conductive component 10, and thus the cost of the conductive component 10 is low. On the other hand, the transmittance of the metal mesh 120 is high. The surface resistivity of the conductive component 10 is as low as 1 Ω / sq. The transmittance of the conductive component 10 may be adjusted by modifying the aperture ratio of the metal mesh 120 and the transmittance of the insulating layer 110, which is very flexible.

  The shape of the gap 121 of the metal mesh 120 is not limited to a square as shown in FIG. 2, it may be a polygon, and the first metal line 123 and the second metal line 125 are formed into a plurality of crosses. It should be noted that the present invention is not limited to a mesh line structured by intersecting metal wires 1201.

  Referring to FIG. 3, the gaps 321 of the metal mesh 320 of another embodiment are diamond-shaped and arranged in an array. The metal mesh 320 includes a plurality of parallel first metal lines 323 and a plurality of parallel second metal lines 325. The first metal line 323 and the second metal line 325 intersect with each other and are inclined with respect to each other to form a plurality of rhombus gaps 321 arranged in an array, and the first metal line 323 and the second metal line 325 The second metal line 325 is a solid line.

  Referring to FIG. 4, the gaps 421 of the metal mesh 420 of another embodiment are triangular and are arranged in an array. The metal mesh 420 includes a plurality of parallel first metal lines 423, a plurality of parallel second metal lines 425 and a plurality of parallel third metal lines 427. The first metal line 423 and the second metal line 425 are inclined with respect to each other and intersect with each other to form a plurality of rhombus gaps 421 arranged in an array, and the third metal line 427 includes Crossing the two opposite ends of the diamond-shaped gap, the diamond-shaped gap is divided into triangular gaps 421 arranged in an array.

  Referring to FIG. 5, the gap 521 of another example metal mesh 520 is a regular hexagon in a honeycomb configuration.

  With reference to FIGS. 1, 2 and 6, an embodiment of a method for preparing a conductive component includes the following steps.

In S <b> 101, a metal layer is formed on the insulating layer 110.
The insulating layer 110 is a glass substrate or a plastic film. The glass substrate is formed from an inorganic silicate or polymethyl methacrylate (PMMA) material. The plastic film is formed from a material of polyethylene terephthalate (PET) or polycarbonate (PC). In short, the insulating layer 110 is formed of a transparent insulating material.

The thickness of the metal layer is not less than 45 nm and not more than 40000 nm.
A functional layer (not shown) having antiglare, curing, antireflection, and atomization functions may be formed on the surface of the insulating layer 110 as necessary. The functional layer may be selectively disposed on one surface of the insulating layer 110 or two opposite surfaces of the insulating layer 110.

  The functional layer having an anti-glare or atomizing function is formed by coating a paint having an anti-glare or atomizing function, which includes metal oxide particles; Formed by coating a functional polymer coating; the functional layer with anti-reflective function is a titanium dioxide coating, a magnesium fluoride coating or a calcium fluoride coating.

  In the example shown, the metal layer is formed by vacuum deposition, chemical vapor deposition or sol-gel method. The metal layer is formed from a material of copper, silver, molybdenum aluminum molybdenum alloy, or copper nickel alloy. It should be noted that when a functional layer is provided on the surface of the insulating layer 110, the metal layer is formed on the surface of the functional layer.

  In order to avoid oxidation of the metal layer, an antioxidant layer is formed on the surface of the metal layer by vacuum evaporation or magnetron sputtering, and the antioxidant layer is an inert metal such as gold, platinum, nickel, nickel gold alloy etc. Formed from the material.

  In S102, the metal layer is processed to form a metal mesh 120 placed on the insulating layer 110 by exposure and development. The metal mesh 120 has a plurality of gaps 121 arranged in an array, and the metal mesh 120 includes a plurality of first metal lines 123 and a plurality of second metal lines 125.

  In the illustrated embodiment, the shapes and sizes of the plurality of gaps 121 are the same. The gap 121 is a square, rhombus, triangle, or hexagon gap arranged in an array.

  The width (D) of the lines of the metal mesh 120 (that is, the first metal line 123 and the second metal line 125) is not less than 45 nm and not more than 40000 nm. The width (D) of the first metal line 123 and the second metal line 125 of the metal mesh 120 has an influence on the resolution of the touch screen 10 and the line width (D) of the metal mesh 120 is too large. It should be noted that a line will be visible and therefore the resolution of the touch screen 10 may be affected. Preferably, the line width (D) of the metal mesh 120 is not less than 45 nm and not more than 5000 nm.

The relationship between the aperture ratio (K) of the metal mesh 120, the transmittance (T ₁ ) of the conductive component 10, and the transmittance (T ₂ ) of the insulating layer satisfies the following formula: T ₁ = T ₂ ^* K As described.

  The metal mesh 120 is disposed on the insulating layer 110 in the conductive component 10. In use, a patterned sensing layer on the insulating layer 110 can be achieved by exposing and developing the metal mesh, if desired, and then applied to the touch screen. Furthermore, the first metal line 123 and the second metal line 125 can be processed into a mesh-like wire by exposure and development as necessary. The use of indium tin oxide is avoided in the conductive component 10, and thus the cost of the conductive component 10 is low. At the same time, the metal mesh 120 is prepared by exposure and development, and the process is simple and highly efficient.

  While the description of the examples is specific and detailed, it should be understood that the description is not used to limit the disclosure. Therefore, the scope of protection of this invention patent should be the subject of the claims.

Claims (34)

Conductive components:
An insulating layer; and a metal mesh placed on the insulating layer, wherein the metal mesh defines a plurality of gaps arranged in an array, the opening ratio K of the gaps of the metal mesh, and the conductivity The relationship between the light transmittance T _{1 of the} component and the light transmittance T ₂ of the insulating layer is a conductive component described as the formula: T ₁ = T ₂ ^* K.   The gap is a square or a rhombus, and the metal mesh includes a plurality of parallel first metal lines and a plurality of parallel second metal lines, and the first metal line and the second metal line, The conductive component of claim 1, wherein the crossing each other to form the gap.   The conductive component according to claim 2, wherein at least one of the first metal wire and the second metal wire is a solid wire or a mesh wire.   The conductive component according to claim 2, wherein a width of the first metal line and the second metal line is 45 nm or more and 40000 nm or less.   The conductive component according to claim 4, wherein the widths of the first metal line and the second metal line are 45 nm or more and 5000 nm or less.   The conductive component of claim 1, wherein the gaps in the metal mesh are regular hexagons in a honeycomb configuration.   The gap of the metal mesh is a triangle, and the metal mesh includes a plurality of parallel first metal lines, a plurality of parallel second metal lines, and a plurality of parallel third metal lines. The first metal line and the second metal line are inclined with respect to each other and intersect with each other to form a plurality of rhombus gaps arranged in an array, and the third metal line is The conductive component of claim 1, wherein the diamond-shaped gap is divided into triangular gaps through opposing ends of the corresponding diamond-shaped gap.   The conductive component according to claim 7, wherein at least one of the first metal line, the second metal line, and the third metal line is a solid line or a mesh-like line.   The conductive component according to claim 7, wherein a width of the first metal line, the second metal line, and the third metal line is 45 nm or more and 40000 nm or less.   The conductive component according to claim 9, wherein the widths of the first metal line, the second metal line, and the third metal line are 45 nm or more and 5000 nm or less.   The conductive configuration according to claim 1, wherein an anti-oxidation layer is provided on a surface of the metal mesh, and the anti-oxidation layer is formed of a material selected from the group consisting of gold, platinum, nickel, and a nickel-gold alloy. element.   The conductive component according to claim 1, wherein the insulating layer is a glass substrate or a plastic film.   The conductive component of claim 12, wherein the glass substrate is formed from a material selected from the group consisting of inorganic silicate glass and polymethyl methacrylate.   The electrically conductive component of claim 12, wherein the plastic film is formed from a material selected from the group consisting of polyethylene terephthalate and polycarbonate.   The surface of the said insulating layer is provided with the functional layer which has a function of glare-proof, hardening, antireflection, and atomization, The said metal mesh is formed on the surface of the said functional layer, The electroconductivity of Claim 1 Component.   The conductive component according to claim 15, wherein the functional layer having the antireflection function is selected from the group consisting of a titanium dioxide coating, a magnesium fluoride coating, and a calcium fluoride coating.   The conductive component according to claim 1, wherein a thickness of the metal mesh is 45 nm or more and 40000 nm or less. A method for preparing a conductive component comprising:
Forming a metal layer on the insulating layer;
Processing the metal layer to form a metal mesh placed on the insulating layer by exposure and development methods, the metal mesh defining a plurality of gaps arranged in an array, The relationship between the aperture ratio K of the gap of the metal mesh, the light transmittance T ₁ of the conductive component, and the light transmittance T ₂ of the insulating layer is described as an equation: T ₁ = T ₂ ^* K. The way.   The gap is a square or a rhombus, and the metal mesh includes a plurality of parallel first metal lines and a plurality of parallel second metal lines, and the first metal line and the second metal line, The method of preparing a conductive component according to claim 18, wherein the crosses with each other to form the gap.   20. The method of preparing a conductive component according to claim 19, wherein at least one of the first metal line and the second metal line is a solid line or a mesh line.   The method for preparing a conductive component according to claim 19, wherein a width of the first metal line and the second metal line is not less than 45 nm and not more than 40000 nm.   The method for preparing a conductive component according to claim 21, wherein the widths of the first metal line and the second metal line are not less than 45 nm and not more than 5000 nm.   The method of preparing a conductive component according to claim 18, wherein the gaps in the metal mesh are regular hexagons and are in a honeycomb configuration.   The gap of the metal mesh is a triangle, and the metal mesh includes a plurality of parallel first metal lines, a plurality of parallel second metal lines, and a plurality of parallel third metal lines. The first metal line and the second metal line are inclined with respect to each other and intersect with each other to form a plurality of rhombus gaps arranged in an array, and the third metal line is 19. A method of preparing a conductive component according to claim 18, wherein the diamond-shaped gap is divided into triangular gaps through two opposite ends of the corresponding diamond-shaped gap.   25. The conductive component of claim 24, wherein at least one of the first metal line, the second metal line, and the third metal line is a solid line or a mesh line. How to prepare.   The method for preparing a conductive component according to claim 24, wherein a width of the first metal line, the second metal line, and the third metal line is 45 nm or more and 40000 nm or less.   27. The method for preparing a conductive component according to claim 26, wherein the widths of the first metal line, the second metal line, and the third metal line are 45 nm or more and 5000 nm or less.   The conductive configuration according to claim 18, wherein an anti-oxidation layer is provided on a surface of the metal mesh, and the anti-oxidation layer is formed of a material selected from the group consisting of gold, platinum, nickel, and gold-nickel alloy. How to prepare the element.   The method for preparing a conductive component according to claim 18, wherein the insulating layer is a glass substrate or a plastic film.   30. The method of preparing a conductive component according to claim 29, wherein the glass substrate is formed from a material selected from the group consisting of inorganic silicate glass and polymethyl methacrylate.   30. The method of preparing a conductive component according to claim 29, wherein the plastic film is formed from a material selected from the group consisting of polyethylene terephthalate and polycarbonate.   The surface of the said insulating layer is provided with the functional layer which has a function of glare-proof, hardening, antireflection, and atomization, The said metal mesh is formed on the surface of the said functional layer, The electroconductivity of Claim 18 How to prepare the component.   33. A method for preparing a conductive component according to claim 32, wherein the functional layer having the antireflective function is selected from the group consisting of a titanium dioxide coating, a magnesium fluoride coating, and a calcium fluoride coating.   The method for preparing a conductive component according to claim 18, wherein a thickness of the metal mesh is 45 nm or more and 40000 nm or less.